Goodwill
Our goodwill was $143.7 million as of December 31, 2020 and $81.5 million as of December 31, 2019. In the fourth quarter of 2020, we performed a review for impairment of goodwill, and concluded that goodwill was not impaired. The following table summarizes the components of goodwill for the years ended December 31 (in millions):
20202019
Rail North America$23.8 $23.8 
Rail International62.9 57.7 
Other57.0 — 
Ending balance$143.7 $81.5 

We acquired Trifleet in December 2020. See "Note 5. Business Combinations" for additional information. A preliminary valuation of the acquired net assets of Trifleet resulted in the allocation of $57.0 million to goodwill. We expect to finalize the valuation of the acquired net assets of Trifleet, including the related goodwill, within the one-year measurement period from the date of acquisition.

Other than the goodwill acquired as part of the Trifleet acquisition, changes in the carrying amount of our goodwill for 2020 resulted from fluctuations in foreign currency exchange rates.

Historical Timeline

Fiscal YearFiled
2020Feb 18, 2021Showing above
2019Feb 19, 2020
2018Feb 25, 2019
2017Feb 21, 2018
2016Feb 22, 2017
2015Feb 24, 2016

About Goodwill & Intangibles Disclosures

Goodwill and intangible asset disclosures reveal the premium paid in acquisitions and how management assesses whether that premium retains its value. Since goodwill is no longer amortized under US GAAP, the annual impairment test is the only mechanism that adjusts carrying values downward — making the assumptions behind that test critically important for investors.

Key signals: a history of goodwill impairments suggests management consistently overpays for acquisitions. Watch the gap between reporting unit fair value and carrying amount — when fair value exceeds carrying amount by less than 10-20%, a small decline in business performance could trigger a write-down. For finite-lived intangibles, examine useful life assumptions across customer relationships, technology, and trade names; aggressive estimates inflate near-term earnings. Compare total intangibles-to-total-assets ratios against peers to assess acquisition dependency. Rising goodwill as a percentage of equity can signal balance sheet fragility.